Anything that occupies space and has mass is called Learning Objective: 2.01 Explain the relationship between atoms and elements.. Moving in pathways called orbitals Learning Objective:
Trang 1Chapter 002 The Chemistry of Biology
Multiple Choice Questions
1 Anything that occupies space and has mass is called
A Always equal to the number of neutrons in an atom
B Found in the nucleus
C Used to determine atomic number
D Positively charged
E Moving in pathways called orbitals
3 The electrons of an atom are
A Always equal to the number of protons
B Used to determine the atomic weight
C Carrying a positive charge
D Used to determine the atomic number
E Always in full orbitals
4 All of the following pertain to the atom carbon-14 except
Trang 25 The subatomic particles that surround the nucleus are the
A Electrons
B Protons
C Neutrons
D Protons and neutrons
E Protons and electrons
6 Isotopes are atoms of the same element that differ in their
Trang 310 The valence number is the
A Number of protons
B Number of neutrons
C Atomic weight
D Number of inner most electrons
E Number of outer most electrons
11 Two or more atoms bonded together are called a/an
D Atoms of different electro negativity
E Atoms of identical electro negativity
14 Polar molecules
A Have an equal charge distribution
B Have an unequal charge distribution
C Are insoluble in water
D Always contain carbon
E Always involve oxygen
Trang 415 Covalent bonds
A Result from losing electrons
B Are always polar
C Are always non-polar
D Result from sharing electrons
E Result from gaining electrons
16 Cations are a(n)
A Charged subatomic particles
B Atoms that have gained electrons
C Atoms that have gained neutrons
D Capable of forming ionic bonds with anions
E Atoms without protons
17 A reaction where an electron is lost is called
A Result from sharing electrons
B Result from transferring electrons
C Results from like charge attraction
D Are the weakest chemical bonds
E Always involve carbon
Trang 520 Hydrogen bonds
A Result from attractive forces between molecules with polar covalent bonds
B Result from attractive forces between molecules with polar ionic bonds
C Result from attractive forces between molecules with non-polar covalent bonds
D Result from attractive forces between molecules with non-polar ionic bonds
E Are the strongest bonds between molecules
21 Atoms that gain or lose electrons become charged particles called
E All of the choices are correct
22 Substances that release ions when dissolved in water and conduct electricity are
E None of the choices are correct
24 Which of the following represents a reversible reaction?
Trang 625 The important solvent associated with living things is
C Are acidic in solution
D Are basic in solution
E Always form salts in solution
27 A solution is composed of one or more substances called _ that are uniformly dispersed in a dissolving medium called a _
A Solvent, solute
B Solute, solvent
C Neither solvent, solute nor solute, solvent
D Both solvent, solute and solute, solvent
28 Which term does not belong in this list?
Trang 730 A solution of pH 7 compared to a solution of pH 9
A 2 times more acidic
B 20 times more acidic
C 20 times more basic
D 100 times more acidic
E 100 times more basic
31 Which of the following functional groups is mismatched to the organic compound?
A Chains of hydrophobic molecules
B Chains of electrolytic molecules
C Chains of repeating monomers
D Chains of repeating carbohydrates
E Chains of hydrogen bonds
34 All of the following are monosaccharides except
Trang 835 Which of the following would have glycosidic bonds?
A Dextran in some bacterial slime layers
B Agar used to make solid culture media
E All of these store food as starch
39 All of the following are lipids except
Trang 940 What part of a phospholipid forms hydrophobic tails?
E All of the choices are correct
41 A fat is called _ if all carbons of the fatty acid chain are single bonded to 2 other carbons and
E None of the choices are correct
42 The lipid group that serves as energy storage molecules are
Trang 1045 An amino acid contains all of the following except
C Participate in the cell's chemical reactions
D Can be denaturated by heat and other agents
E Have high-energy bonds between phosphates
47 Which amino acid contains sulfur atoms that form covalent disulfide bonds in its tertiary structure?
Trang 1150 One nucleotide contains
A One phosphate
B One pentose sugar
C One nitrogen base
D All of the choices are correct
E None of the choices are correct
51 Which pertains to DNA but not to RNA?
D The energy molecule of cells
E All of the choices are correct
53 A student forgot to label a beaker containing a DNA solution and a beaker containing a glucose solution If chemical analysis was performed to identify the contents of each beaker, which of the following would be found in the beaker of DNA but not in the beaker with glucose?
A Amino acids
B Hydrogen and oxygen atoms
C Nitrogen and phosphorus
Trang 1255 Which of the following is not a pyrimidine?
E All of these are pyrimidines
56 During protein synthesis, RNA is made to be a copy of a gene from the DNA
A Transfer
B Messenger
C Ribosomal
D All of the choices are correct
57 Characteristics of shared by all cells include:
A a membrane serving as a cell boundary
B the possession of genetic information
C the presence of cellular fluid
Trang 1360 You are asked to make a 1M solution of Sodium Bicarbonate or Baking Soda (NaHCO3 ) for a DNA extraction lab How many gram(s) of sodium bicarbonate (NaHCO3 ) should be added to 1L
of water to make the required solution? Use the table of atomic masses to help you
True / False Questions
61 Elements have predictable chemical properties
Trang 1469 The only part of an amino acid that differs from other amino acids is its R group
Trang 15Chapter 002 The Chemistry of Biology Key
Multiple Choice Questions
1 Anything that occupies space and has mass is called
Learning Objective: 2.01 Explain the relationship between atoms and elements
2 The electrons of an atom are
A Always equal to the number of neutrons in an atom
B Found in the nucleus
C.Used to determine atomic number
D.Positively charged
E Moving in pathways called orbitals
Learning Objective: 2.01 Explain the relationship between atoms and elements
3 The electrons of an atom are
A Always equal to the number of protons
B Used to determine the atomic weight
C.Carrying a positive charge
D.Used to determine the atomic number
E Always in full orbitals
Learning Objective: 2.01 Explain the relationship between atoms and elements
4 All of the following pertain to the atom carbon-14 except
E All of the choices pertain to carbon-14
Learning Objective: 2.01 Explain the relationship between atoms and elements
Trang 165 The subatomic particles that surround the nucleus are the
A Electrons
B Protons
C.Neutrons
D.Protons and neutrons
E Protons and electrons
Learning Objective: 2.01 Explain the relationship between atoms and elements
6 Isotopes are atoms of the same element that differ in their
Learning Objective: 2.01 Explain the relationship between atoms and elements
7 What is the maximum number of electrons in the second energy shell of an atom?
Learning Objective: 2.01 Explain the relationship between atoms and elements
8 What is the maximum number of electrons in the first energy shell of an atom?
Learning Objective: 2.01 Explain the relationship between atoms and elements
9 Protons and neutrons make up the atom's central core referred to as its
E None of the choices are correct
Learning Objective: 2.01 Explain the relationship between atoms and elements
Trang 1710 The valence number is the
A Number of protons
B Number of neutrons
C.Atomic weight
D.Number of inner most electrons
E Number of outer most electrons
Learning Objective: 2.01 Explain the relationship between atoms and elements
11 Two or more atoms bonded together are called a/an
Learning Objective: 2.02 List and define 4 types of chemical bonds
12 What would be the valence number of electrons in the sulfur (S) atom?
Learning Objective: 2.02 List and define 4 types of chemical bonds
13 Polar molecules are composed of covalently bonded
A Identical atoms
B Carbon atoms
C.Ions
D Atoms of different electro negativity
E Atoms of identical electro negativity
Learning Objective: 2.02 List and define 4 types of chemical bonds
Trang 1814 Polar molecules
A Have an equal charge distribution
B Have an unequal charge distribution
C.Are insoluble in water
D.Always contain carbon
E Always involve oxygen
Learning Objective: none
15 Covalent bonds
A Result from losing electrons
B Are always polar
C.Are always non-polar
D Result from sharing electrons
E Result from gaining electrons
Learning Objective: 2.02 List and define 4 types of chemical bonds
16 Cations are a(n)
A Charged subatomic particles
B Atoms that have gained electrons
C.Atoms that have gained neutrons
D Capable of forming ionic bonds with anions
E Atoms without protons
Learning Objective: 2.02 List and define 4 types of chemical bonds
17 A reaction where an electron is lost is called
Learning Objective: none
18 An atom has gained an electron It has been
Trang 1919 Ionic bonds
A Result from sharing electrons
B Result from transferring electrons
C.Results from like charge attraction
D.Are the weakest chemical bonds
E Always involve carbon
Learning Objective: none
20 Hydrogen bonds
A Result from attractive forces between molecules with polar covalent bonds
B Result from attractive forces between molecules with polar ionic bonds
C.Result from attractive forces between molecules with non-polar covalent bonds
D.Result from attractive forces between molecules with non-polar ionic bonds
E Are the strongest bonds between molecules
Learning Objective: 2.02 List and define 4 types of chemical bonds
21 Atoms that gain or lose electrons become charged particles called
E All of the choices are correct
Learning Objective: 2.02 List and define 4 types of chemical bonds
22 Substances that release ions when dissolved in water and conduct electricity are
Trang 2023 Which of the following represents a synthesis reaction?
E None of the choices are correct
Learning Objective: none
24 Which of the following represents a reversible reaction?
E None of the choices are correct
Learning Objective: none
25 The important solvent associated with living things is
Learning Objective: 2.03 Differentiate between a solute and a solvent
26 Ionic compounds are
A Hydrophobic
B Hydrophilic
C.Are acidic in solution
D.Are basic in solution
E Always form salts in solution
Learning Objective: none
27 A solution is composed of one or more substances called _ that are uniformly dispersed
in a dissolving medium called a _
A Solvent, solute
B Solute, solvent
C.Neither solvent, solute nor solute, solvent
D.Both solvent, solute and solute, solvent
Learning Objective: 2.03 Differentiate between a solute and a solvent
Trang 2128 Which term does not belong in this list?
Learning Objective: 2.04 Give a brief definition of pH
29 A solution of pH 7 compared to a solution of pH 9
E All of the choices are correct
Learning Objective: 2.04 Give a brief definition of pH
30 A solution of pH 7 compared to a solution of pH 9
A 2 times more acidic
B 20 times more acidic
C.20 times more basic
D 100 times more acidic
E 100 times more basic
Learning Objective: 2.04 Give a brief definition of pH
31 Which of the following functional groups is mismatched to the organic compound?
Trang 2232 Organic chemicals always have a basic framework of the element _ bonded to other
Learning Objective: none
33 Most biochemical macromolecules are polymers, which are
A Chains of hydrophobic molecules
B Chains of electrolytic molecules
C Chains of repeating monomers
D.Chains of repeating carbohydrates
E Chains of hydrogen bonds
Learning Objective: none
34 All of the following are monosaccharides except
Learning Objective: 2.05 Name the 4 main families of biochemicals
35 Which of the following would have glycosidic bonds?
Trang 2336 All of the following are polysaccharides except
A Dextran in some bacterial slime layers
B Agar used to make solid culture media
Learning Objective: none
38 Starch is the primary storage food for all of the following except
E All of these store food as starch
Learning Objective: 2.05 Name the 4 main families of biochemicals
39 All of the following are lipids except
Trang 2440 What part of a phospholipid forms hydrophobic tails?
E All of the choices are correct
Learning Objective: 2.05 Name the 4 main families of biochemicals
41 A fat is called _ if all carbons of the fatty acid chain are single bonded to 2 other carbons
E None of the choices are correct
Learning Objective: 2.05 Name the 4 main families of biochemicals
42 The lipid group that serves as energy storage molecules are
Learning Objective: 2.05 Name the 4 main families of biochemicals
43 The lipid group that is the major component of cell membranes are the
Trang 2544 The building blocks of an enzyme are
Learning Objective: 2.05 Name the 4 main families of biochemicals
45 An amino acid contains all of the following except
Learning Objective: 2.05 Name the 4 main families of biochemicals
46 Which is not true about enzymes?
A Found in all cells
B Are catalysts
C.Participate in the cell's chemical reactions
D.Can be denaturated by heat and other agents
E Have high-energy bonds between phosphates
Learning Objective: none
47 Which amino acid contains sulfur atoms that form covalent disulfide bonds in its tertiary
Learning Objective: 2.07 Explain primary
Learning Objective: secondary Learning Objective: tertiary and quaternary structure as seen in proteins
Trang 2648 What type of bonds are formed by dehydration synthesis between adjacent amino acids?
Learning Objective: 2.05 Name the 4 main families of biochemicals
49 The a – helix is a type of _ protein structure
Learning Objective: 2.07 Explain primary
Learning Objective: secondary Learning Objective: tertiary and quaternary structure as seen in proteins
50 One nucleotide contains
A One phosphate
B One pentose sugar
C.One nitrogen base
D All of the choices are correct
E None of the choices are correct
Learning Objective: 2.08 List the 3 components of nucleic acids
51 Which pertains to DNA but not to RNA?
Trang 2752 ATP is best described as
A An enzyme
B A double helix
C.An electron carrier
D The energy molecule of cells
E All of the choices are correct
Learning Objective: 2.10 List the 3 components of ATP
53 A student forgot to label a beaker containing a DNA solution and a beaker containing a
glucose solution If chemical analysis was performed to identify the contents of each beaker, which of the following would be found in the beaker of DNA but not in the beaker with
glucose?
A Amino acids
B Hydrogen and oxygen atoms
C Nitrogen and phosphorus
D.Fatty acids
E Carbon atoms
Learning Objective: 2.09 Name the nucleotides of DNA and of RNA
54 Purines and pyrimidines are components in the building block units of all
Learning Objective: none
55 Which of the following is not a pyrimidine?
E All of these are pyrimidines
Learning Objective: 2.09 Name the nucleotides of DNA and of RNA